Manual Rockwell Hardness Tester is a commonly used device for metal hardness testing. The hardness is determined by applying Test Force and MeasurementIndentation residual depth in two steps, as follows:
specimensurface need ,、 etc.defect,surface need grindingRa≤0.8μm,avoidprocessinghard;mostsmallthickdegreessmall in 2mm(thinspecimen need thick),Indentation and Indentationsidelarge in 3mm;rulespecimendedicatedworktablefixed,ensuretestingsurface and indentervertical。
equipmentcomponentbad,pcs100mm need lowerlead screwprotectsets; by materialchooseindenter(used forHRA、HRC,used forHRB),installhoureliminateindenter and Axis;according toadjustmentTest Force,hour in state;calibrationspeed(1-8sec) and (error±1HRCinner),3-6pcsmonthcalibration。
1. specimen:lead screw and worktable,willspecimen,ensure。
2. initialTest Force:hour, make specimen and indenterslow,smallpoint、large3vertical to upper,zero。
3. Test Force:slowafter(2-8sec),Test Force5sec(metal10-15sec),avoid。
4. Test Force:frontTest Force, etc.3-5secstable。
5. Hardness Value: by for should degrees(outerSimHei,innerbody),line and vertical。
6. heavytesting:lowerworktable,mobilespecimennewheavytesting,specimenfew5point(firstpoint), is mostfinalresult。
Power Supply,willworktablemostlow,lowerspecimen;softindenter、worktable and lead screw,lowerindentersave; in ,Test Forcemostlow,setsgoodlead screwprotectsets and dustproof;lead screwlubrication,goodoperationrecord。
operationall,avoidTest Forceimpact,worktableupperhourafter;testinghourindenter and specimen,specimenlightlight;surfacespecimen need currentlyerror,crack、testingpoint。